150821-N-BK290-284 DA NANG, Vietnam (Aug. 21, 2015) Musician 2nd Class Christian Ivy, assigned to the Pacific Fleet Band, plays the tuba during a performance at the Dragon Bridge in Da Nang, Vietnam. The band is embarked aboard the Military Sealift Command hospital ship USNS Mercy (T-AH 19) for Pacific Partnership 2015. Mercy is in Vietnam for its fourth mission port of Pacific Partnership 2015. Pacific Partnership is in its 10th iteration and is the largest annual multilateral humanitarian assistance and disaster relief preparedness mission conducted in the Indo-Asia-Pacific region. (U.S. Navy photo by Chief Mass Communication Specialist Christopher E. Tucker/Released)